While Marissa does all she can to get to know Kaitlin better, she just stirs up more trouble for the gang as she prepares to celebrate her 15th birthday. Meanwhile, Sandy encourages Seth about college, but Seth finds a better alternative, thanks to Kaitlin. Sandy and Matt work together to secure a contract for Newport's new hospital. Also, Julie continues her quest to put her family back together again by trowing a birthday party at Dr. Roberts house.